Once
per turn, during your Main Phase, if you control this card on the
field, you can equip it to your "X-Head Cannon" or "Y-Dragon Head" as
an Equip Card, OR unequip the Union equipment and Special Summon this
card in face-up Attack Position. While equipped to a monster by this
card's effect, increase the ATK/DEF of the equipped monster by 600
points. (1 monster can only be equipped with 1 Union Monster at a time.
If the equipped monster is destroyed as a result of battle, destroy
this card instead.)
